Best way to authenticate requests

I am trying to figure out the best way to authenticate a request before my schema executes the query/mutation. I was thinking I could use the @app.resolver('url') tag and create a function that would authenticate the request and then pass it to the graphqlview. Something like this:
```
@app.route('/graphql/')
def graphql():
print request.headers #AUTHENTICATE HERE
print request.data
return GraphQLView.as_view('/graphql/', schema=schema, graphiql=True)
```
But this doesn't work, can someone either show me what I am doing wrong here or give me a different way to authenticate the request? Thanks!